Finding the Fourth Proportional to 687,386,733.75, 948,593,639.97 and 374,123,193.84
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Solution
The fourth proportional to 687,386,733.75, 948,593,639.97 and 374,123,193.84 is: 516,289,978.87
Step by Step Solution
- Step 1: Write the proportion equation
687,386,733.75 : 948,593,639.97 = 374,123,193.84 : x - Step 2: Convert to fraction form
687,386,733.75/948,593,639.97 = 374,123,193.84/x - Step 3: Cross multiply
687,386,733.75x = 948,593,639.97 × 374,123,193.84 - Step 4: Simplify right side
687,386,733.75x = 354,890,882,241,887,488 - Step 5: Solve for x
x = 354,890,882,241,887,488/687,386,733.75 - Step 6: Final answer
x = 516,289,978.87
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.